# Shun Hachisuka

Journal Entry For
Module 7 - Study Your Options
Created By
Shun Hachisuka
Property
Related to 120C/220C Students - Spring 2022 (1) (Related to Design Journal Entries | Winter 2022 (Linked Student))

### Step 1 - Generative Design Framework

A very brief description of the design decisions from Step 1 following the Generative Design Framework.

• Construction Planning
• Construction Time vs. Construction Cost vs. Product Quality
• Fabrication Cost vs. Assembly Time
• Structural Design
• Member Weight vs. Deformation or Drift
• Bay Size vs. Materials Cost
• Architectural Design
• Materials Cost vs. Appearance Quality
• Sustainability
• Capital Cost vs. Operating Cost
• Material Cost vs. Carbon Footprint
• Construction Planning
• Design Variables
• Labor cost
• The number of crew
• Total floor
• Evaluators
• Construction Time
• Construction Cost
• Most Important Tradeoffs to Consider
• Construction Time vs Construction Cost
• Structural Design
• Design Variables
• Grid and span
• Material weight
• Material cost
• Evaluators
• Total cost of structure
• Total weight of material
• Most Important Tradeoffs to Consider
• Grid span vs Total cost
• Sustainability
• Design Variables
• Top floor area
• Equipment cost
• Evaluators
• Carbon Footprint
• Solar energy
• Total cost
• Most Important Tradeoffs to Consider
• Carbon Footprint vs Top floor area

### Step 2 - Generative Design Study

• Construction total cost per SF = total cost / total floor area
• Construction cost = Construction time * Labor cost * The number of labors
• Construction time = floor area or facade area / ( the number of labors * working speed per day)
• Labor cost at height = Labor cost at bottom + (X * Labor cost at bottom / number of stories) * floor level

### Step 3 - Generative Design Study Results

• The X-Axis and Y-Axis represent total cost and total cost / SF respectively. The size of the dots illustrates the construction time and the color shows the tower’s story height. The dots close to X-Axis indicate more efficient buildings to construct, whereas the total cost increase as the dots go toward the right side. In other words, the building will be wider as the dots go towards the right.
• For 4 units, create a Study Graph with:
1. Four design variables

2. I created radius, rotation, number sides, and story height of the tower as variables.
3. Additionally, I created labor costs and working rate variables.